Patients with scoliosis demonstrate an altered gait pattern. Such differences include decreased step length and reduced range of motion in the upper and lower extremities, asymmetry of trunk rotation and ground reaction force in three-dimensions. Mahaudens et al. found a decrease in the muscular mechanical work associated with an increase of energy cost and a decrease in the muscular efficiency in a scoliosis population compared to healthy controls. Furthermore, scoliosis patients exert 30% more physical effort than healthy subjects to ensure habitual locomotion, and this additional effort requires a reciprocal increase of oxygen consumption. This altered gait pattern demonstrated by subjects with scoliosis may be due to changes in global postural control strategies caused by spinal deformity.